/*
 *  Copyright 2013 National Institute of Advanced Industrial Science and Technology
 *  
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *  
 *      http://www.apache.org/licenses/LICENSE-2.0
 *  
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package org.sss.mapreduce.example;

import org.sss.client.JobEngine;
import org.sss.client.SssClient;
import org.sss.mapreduce.GroupID;

public class WordAndLengthCount {
  /**
   * Usage:
   * java WordAndLengthCount groupid
   */
  public static void main(String[] args) throws Exception {
    SssClient client = new SssClient(args);

    String[] others = client.getArgs();
    if (others.length < 1) {
      System.err.println("input group id is not specified.");
      System.exit(1);
    }

    JobEngine engine = new JobEngine(client);
    try {
      GroupID c0 = GroupID.createFromString(others[0]);
      GroupID c1 = GroupID.createRandom(engine);
      GroupID c2 = GroupID.createRandom(engine);
      GroupID c3 = GroupID.createRandom(engine);
      GroupID c4 = GroupID.createRandom(engine);

      engine.getJobBuilder("jobA", TokenizerMapper2.class)
        .addInput(c0)
        .addOutput(c1, IntSumReducer.class)
        .addOutput(c2, IntSumReducer2.class).build();

      engine.getJobBuilder("jobB", IntSumReducer.class)
        .addInput(c1)
        .addOutput(c3).build();

      engine.getJobBuilder("jobC", IntSumReducer2.class)
        .addInput(c2).addOutput(c4).build();

      engine.exec();
    } finally {
      engine.dispose();
    }
  }
}
